e-REC (e-Reporting Of Rare Conditions) is an electronic reporting system that has been designed to understand the occurrence of a wide range of conditions that may be encountered within networks such as Endo-ERN and BOND. The platform which was originally launched in 2018 is open to all centres that look after people with such conditions, it allows continuous reporting of core indicators of activity and enables clinical networks to objectively map the conditions and related activity.